diff options
Diffstat (limited to 'src/mess/drivers/ti990_4.c')
-rw-r--r-- | src/mess/drivers/ti990_4.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/src/mess/drivers/ti990_4.c b/src/mess/drivers/ti990_4.c new file mode 100644 index 00000000000..82053acd7e6 --- /dev/null +++ b/src/mess/drivers/ti990_4.c @@ -0,0 +1,353 @@ +/* + ti990/4 driver + + We emulate a basic ti990/4 board, with a FD800 disk controller and an 733 + ASR terminal. A little floppy-based software for this computer is + available thanks to efforts by Dave Pitts: mostly, Forth and TX990. + + + Board setup options: + 8kb of DRAM (onboard option, with optional parity): base 0x0000 or 0x2000 + 4 banks of 512 bytes of ROM or SRAM: base 0x0000, 0x0800, 0xF000 or 0xF800 + power-up vector: 0x0000 (level 0) or 0xFFFC (load) + optional memerr interrupt (level 2) + optional power fail interrupt (level 1) + optional real-time clock interrupt (level 5 or 7) + + + Setup for the emulated system: + 0x0000: 8kb on-board DRAM + 24kb extension RAM (total 32kb) + 0xF800: 512 bytes SRAM + 0xFA00: 512 bytes SRAM (or empty?) + 0xFC00: 512 bytes self-test ROM + 0xFE00: 512 bytes loader ROM + power-up vector: 0xFFFC (load) + + Note that only interrupt levels 3-7 are supported by the board (8-15 are not wired). + +TODO: +* finish ASR emulation +* programmer panel +* emulate other devices: card reader, printer + +*/ + +/*if 1, use 911 VDT; if 0, use 733 ASR */ +#define VIDEO_911 0 + +#include "emu.h" +#include "cpu/tms9900/tms9900l.h" +#include "machine/ti990.h" +#if VIDEO_911 +#include "video/911_vdt.h" +#include "sound/beep.h" +#else +#include "video/733_asr.h" +#endif +#include "imagedev/flopdrv.h" +#include "machine/990_dk.h" + + +class ti990_4_state : public driver_device +{ +public: + ti990_4_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) { } + + device_t *m_terminal; + DECLARE_WRITE8_MEMBER(rset_callback); + DECLARE_WRITE8_MEMBER(ckon_ckof_callback); + DECLARE_WRITE8_MEMBER(lrex_callback); + DECLARE_DRIVER_INIT(ti990_4); +}; + + +static MACHINE_RESET(ti990_4) +{ + ti990_hold_load(machine); + + ti990_reset_int(); + + fd800_machine_init(machine, ti990_set_int7); +} + + +static INTERRUPT_GEN( ti990_4_line_interrupt ) +{ + ti990_4_state *state = device->machine().driver_data<ti990_4_state>(); + +#if VIDEO_911 + vdt911_keyboard(state->m_terminal); +#else + asr733_keyboard(state->m_terminal); +#endif + + ti990_line_interrupt(device->machine()); +} + +#ifdef UNUSED_FUNCTION +static void idle_callback(int state) +{ +} +#endif + +WRITE8_MEMBER(ti990_4_state::rset_callback) +{ + ti990_cpuboard_reset(); + + /* ... */ + + /* clear controller panel and smi fault LEDs */ +} + +WRITE8_MEMBER(ti990_4_state::ckon_ckof_callback) +{ + device_t *maincpu = machine().device("maincpu"); + ti990_ckon_ckof_callback(maincpu, (offset & 0x1000) ? 1 : 0); +} + +WRITE8_MEMBER(ti990_4_state::lrex_callback) +{ + /* right??? */ + ti990_hold_load(machine()); +} + +#if VIDEO_911 + +/* + TI990/4 video emulation. + + We emulate a single VDT911 CRT terminal. +*/ + +static const vdt911_init_params_t vdt911_intf = +{ + char_1920, + vdt911_model_US, + ti990_set_int3 +}; + +static VIDEO_START( ti990_4 ) +{ + ti990_4_state *state = machine.driver_data<ti990_4_state>(); + + state->m_terminal = machine.device("vdt911"); +} + +static SCREEN_UPDATE_IND16( ti990_4 ) +{ + ti990_4_state *state = screen.machine().driver_data<ti990_4_state>(); + vdt911_refresh(state->m_terminal, bitmap, cliprect, 0, 0); + return 0; +} + +#else + +static const asr733_init_params_t asr733_intf = +{ + ti990_set_int6 +}; + +static VIDEO_START( ti990_4 ) +{ + ti990_4_state *state = machine.driver_data<ti990_4_state>(); + + state->m_terminal = machine.device("asr733"); +} + +static SCREEN_UPDATE_IND16( ti990_4 ) +{ + ti990_4_state *state = screen.machine().driver_data<ti990_4_state>(); + asr733_refresh(state->m_terminal, bitmap, 0, 0); + return 0; +} + +#endif + +/* + Memory map - see description above +*/ + +static ADDRESS_MAP_START(ti990_4_memmap, AS_PROGRAM, 16, ti990_4_state ) + AM_RANGE(0x0000, 0x7fff) AM_RAM /* dynamic RAM */ + AM_RANGE(0x8000, 0xf7ff) AM_NOP /* reserved for expansion */ + AM_RANGE(0xf800, 0xfbff) AM_RAM /* static RAM? */ + AM_RANGE(0xfc00, 0xffff) AM_ROM /* LOAD ROM */ +ADDRESS_MAP_END + + +/* + CRU map + + 0x000-0xF7F: user devices + 0xF80-0xF9F: CRU interrupt + expansion control + 0xFA0-0xFAF: TILINE coupler interrupt control + 0xFB0-0xFCF: reserved + 0xFD0-0xFDF: memory mapping and memory protect + 0xFE0-0xFEF: internal interrupt control + 0xFF0-0xFFF: front panel + + Default user map: + 0x000-0x00f: 733 ASR (int 6) + 0x010-0x01f: PROM programmer (wired to int 15, unused) + 0x020-0x02f: 804 card reader (int 4) + 0x030-0x03f: line printer (wired to int 14, unused) + 0x040-0x05f: FD800 floppy controller (int 7) + 0x060-0x07f: VDT1 (int 3 - wired to int 11, unused) + 0x080-0x09f: VDT2, or CRU expansion (int ??? - wired to int 10, unused) + 0x0a0-0x0bf: VDT3 (int ??? - wired to int 9, unused) +*/ + +static ADDRESS_MAP_START(ti990_4_cru_map, AS_IO, 8, ti990_4_state ) +#if VIDEO_911 + AM_RANGE(0x10, 0x11) AM_DEVREAD_LEGACY("vdt911", vdt911_cru_r) + AM_RANGE(0x80, 0x8f) AM_DEVWRITE_LEGACY("vdt911", vdt911_cru_w) +#else + AM_RANGE(0x00, 0x01) AM_DEVREAD_LEGACY("asr733", asr733_cru_r) + AM_RANGE(0x00, 0x0f) AM_DEVWRITE_LEGACY("asr733", asr733_cru_w) +#endif + + AM_RANGE(0x08, 0x0b) AM_READ_LEGACY(fd800_cru_r) + AM_RANGE(0x40, 0x5f) AM_WRITE_LEGACY(fd800_cru_w) + + AM_RANGE(0x1fe, 0x1ff) AM_READ_LEGACY(ti990_panel_read) + AM_RANGE(0xff0, 0xfff) AM_WRITE_LEGACY(ti990_panel_write) + + /* external instruction decoding */ +/* AM_RANGE(0x2000, 0x2fff) AM_WRITE_LEGACY(idle_callback)*/ + AM_RANGE(0x3000, 0x3fff) AM_WRITE(rset_callback) + AM_RANGE(0x5000, 0x6fff) AM_WRITE(ckon_ckof_callback) + AM_RANGE(0x7000, 0x7fff) AM_WRITE(lrex_callback) +ADDRESS_MAP_END + +#if 0 +static const tms9900reset_param reset_params = +{ + idle_callback +}; +#endif + +static const floppy_interface ti990_4_floppy_interface = +{ + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + FLOPPY_STANDARD_5_25_DSHD, + LEGACY_FLOPPY_OPTIONS_NAME(fd800), + NULL, + NULL +}; + +static MACHINE_CONFIG_START( ti990_4, ti990_4_state ) + /* basic machine hardware */ + /* TMS9900 CPU @ 3.0(???) MHz */ + MCFG_CPU_ADD("maincpu", TMS9900L, 3000000) + MCFG_CPU_PROGRAM_MAP(ti990_4_memmap) + MCFG_CPU_IO_MAP(ti990_4_cru_map) + MCFG_CPU_PERIODIC_INT(ti990_4_line_interrupt, 120/*or TIME_IN_HZ(100) in Europe*/) + + MCFG_MACHINE_RESET( ti990_4 ) + + /* video hardware - we emulate a single 911 vdt display */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_REFRESH_RATE(60) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ + MCFG_SCREEN_UPDATE_STATIC(ti990_4) +#if VIDEO_911 + MCFG_SCREEN_SIZE(560, 280) + MCFG_SCREEN_VISIBLE_AREA(0, 560-1, 0, /*250*/280-1) +#else + MCFG_SCREEN_SIZE(640, 480) + MCFG_SCREEN_VISIBLE_AREA(0, 640-1, 0, 480-1) +#endif + +#if VIDEO_911 + MCFG_GFXDECODE(vdt911) + MCFG_PALETTE_LENGTH(8) +#else + MCFG_GFXDECODE(asr733) + MCFG_PALETTE_LENGTH(2) +#endif + +#if VIDEO_911 + MCFG_PALETTE_INIT(vdt911) + MCFG_VDT911_VIDEO_ADD("vdt911", vdt911_intf) +#else + MCFG_PALETTE_INIT(asr733) + MCFG_ASR733_VIDEO_ADD("asr733", asr733_intf) +#endif + MCFG_VIDEO_START(ti990_4) + +#if VIDEO_911 + /* 911 VDT has a beep tone generator */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD(BEEPER_TAG, BEEP, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) +#endif + MCFG_LEGACY_FLOPPY_4_DRIVES_ADD(ti990_4_floppy_interface) + +MACHINE_CONFIG_END + + +/* + ROM loading +*/ +ROM_START(ti990_4) + /*CPU memory space*/ + ROM_REGION16_BE(0x10000, "maincpu",0) + +#if 0 + /* ROM set 945121-5: "733 ASR ROM loader with self test (prototyping)" + (cf 945401-9701 pp. 1-19) */ + + /* test ROM */ + ROMX_LOAD("94519209.u39", 0xFC00, 0x100, CRC(0a0b0c42), ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1)) + ROMX_LOAD("94519210.u55", 0xFC00, 0x100, CRC(d078af61), ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1)) + ROMX_LOAD("94519211.u61", 0xFC01, 0x100, CRC(6cf7d4a0), ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1)) + ROMX_LOAD("94519212.u78", 0xFC01, 0x100, CRC(d9522458), ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1)) + + /* LOAD ROM */ + ROMX_LOAD("94519113.u3", 0xFE00, 0x100, CRC(8719b04e), ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1)) + ROMX_LOAD("94519114.u4", 0xFE00, 0x100, CRC(72a040e0), ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1)) + ROMX_LOAD("94519115.u6", 0xFE01, 0x100, CRC(9ccf8cca), ROM_NIBBLE | ROM_SHIFT_NIBBLE_HI | ROM_SKIP(1)) + ROMX_LOAD("94519116.u7", 0xFE01, 0x100, CRC(fa387bf3), ROM_NIBBLE | ROM_SHIFT_NIBBLE_LO | ROM_SKIP(1)) + +#else + /* ROM set 945121-4(?): "Floppy disc loader with self test" (cf 945401-9701 + pp. 1-19) */ + + ROM_LOAD16_WORD("ti9904.rom", 0xFC00, 0x400, CRC(691e7d19) SHA1(58d9bed80490fdf71c743bfd3077c70840b7df8c)) + +#endif + +#if VIDEO_911 + /* VDT911 character definitions */ + ROM_REGION(vdt911_chr_region_len, vdt911_chr_region, ROMREGION_ERASEFF) +#else + ROM_REGION(asr733_chr_region_len, asr733_chr_region, ROMREGION_ERASEFF) +#endif + +ROM_END + +DRIVER_INIT_MEMBER(ti990_4_state,ti990_4) +{ +#if VIDEO_911 + vdt911_init(machine()); +#else + asr733_init(machine()); +#endif +} + +static INPUT_PORTS_START(ti990_4) +#if VIDEO_911 + VDT911_KEY_PORTS +#else + ASR733_KEY_PORTS +#endif +INPUT_PORTS_END + + +/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */ +COMP( 1976, ti990_4, 0, 0, ti990_4, ti990_4, ti990_4_state, ti990_4, "Texas Instruments", "TI Model 990/4 Microcomputer System" , GAME_NOT_WORKING | GAME_NO_SOUND ) |